A few mentioned here were hard. Zelda II, I have never beaten. I used Game Genie for Battletoads so I can't really say anything for that. Chip N Dale I could never beat without using any codes. I would get three levels until the end and blow it everytime. If I played with my brother he would constantly throw apples at my head and make me dizzy. I wasn't able to do anything and I would constantly cry to my mom that he wasn't being fair.
Roger Rabbit wasn't exactly hard but I got scared everytime I heard the sirens and didn't like the fact that someone was coming to get me so I would just go into the next opened building and hide. Eventually I got to the end but it definately took me a long time.
Earthbound I think I got stuck. I should really plug the system back in and try it now that I'm older.
Secret of Mana was the best game ever!
Edited, Sep 26th 2009 5:49am by popcornshowers